Start with the protection label

The American Academy of Dermatology recommends three features when choosing sunscreen: SPF 30 or higher, broad-spectrum protection, and water resistance. Use these as your first filter before comparing texture or packaging.

Broad-spectrum protection covers UVA and UVB. Do not treat the SPF number as a timetable for how long you can stay outdoors. Application and reapplication still matter.

Read the directions before buying

Check how and when to apply the product, which areas it is intended for, and when it needs reapplication. The AAD advises applying sunscreen before going outdoors; its general application guidance allows about 15 minutes. Follow the directions on your own product.

Label terms and approved claims vary by country. This guide uses the AAD’s selection advice and identifies U.S. FDA label information where relevant; your locally sold product’s directions remain essential.

Choose for an ordinary day

Imagine where the bottle will be when you next need it. A sunscreen that is easy to use at home may be awkward to carry on a long outing. Check that the container fits your bag and holds enough for the application and reapplication your day requires.

If you wear makeup, think through how you will reapply before buying. A preferred finish is useful, but it should not lead you to use less than the directed amount. Consider replacement cost too: a sunscreen needs to remain an affordable repeat purchase.

  • Protection: Does the label meet the criteria above?
  • Use: Are the directions clear for where and how you will apply it?
  • Access: Will you have the product with you when reapplication is due?
  • Preference: Is the format one you are willing to use as directed?

Water resistance does not mean all-day protection

When outdoors, the AAD advises reapplying about every two hours and after swimming or sweating, in line with the product’s directions. The FDA also emphasizes generous application and reapplication; no sunscreen blocks all UV radiation.

On U.S. labels, 40- or 80-minute water resistance describes tested protection during swimming or sweating. It does not mean the sunscreen is waterproof. Read the full reapplication instructions rather than relying on that one number.

Keep the rest of your sun-protection plan

Include shade, protective clothing, a hat, and sunglasses in your plans. Before leaving, check the sunscreen’s expiry date and storage instructions as well as the weather and practical details of your outing.

This is a researched selection framework, not a hands-on product review or a brand endorsement. Ask a qualified healthcare professional for advice about a history of reactions, medicines, or an individual skin condition. For infants younger than six months, seek professional advice before using sunscreen.